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initial "transport" framework

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This adds the guts of a transport framework with initialization,
which should work with current JTAG-only configurations (tested
with FT2232).

Each debug adapter can declare the transports it supports, and
exactly one transport is initialized.  (with its commands) in
any given OpenOCD session.

  * Define a new "struct transport with init hooks and a few
 "transport"  subcommands to support it:

     "list" ... list the transports configured (just "jtag" for now)
     "select" ... makes the debug session use that transport
     "init" ... initializes the selected transport (internal)

  * "interface_transports" ... declares transports the current interface
    can support.  (Some will do this from C code instead, when there are
    no hardware versioning (or other) issues to prevent it.

Plus some FT2232 tweaks, including a few to streamline upcoming
support for an SWD transport (initially for Luminary adapters).

Eventually src/jtag should probably become src/transport, moving
jtag-specific stuff  to transport/jtag.

Signed-off-by: David Brownell <db@helium.(none)>
This commit is contained in:
David Brownell
2010-07-02 16:45:28 -04:00
committed by David Brownell
parent deb176d335
commit 93f2afa45f
10 changed files with 632 additions and 29 deletions
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34
src/openocd.c
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@@ -31,10 +31,9 @@
#include "openocd.h"
#include <jtag/driver.h>
#include <jtag/jtag.h>
#include <jtag/transport.h>
#include <helper/ioutil.h>
#include <helper/configuration.h>
#include <xsvf/xsvf.h>
#include <svf/svf.h>
#include <flash/nor/core.h>
#include <flash/nand/core.h>
#include <pld/pld.h>
@@ -120,22 +119,24 @@ COMMAND_HANDLER(handle_init_command)
/* we must be able to set up the debug adapter */
return retval;
}
LOG_DEBUG("Debug Adapter init complete");
/* Try to initialize & examine the JTAG chain at this point,
* but continue startup regardless. Note that platforms
* need to be able to provide JTAG event handlers that use
* a variety of JTAG operations in order to do that...
/* "transport init" verifies the expected devices are present;
* for JTAG, it checks the list of configured TAPs against
* what's discoverable, possibly with help from the platform's
* JTAG event handlers. (which require COMMAND_EXEC)
*/
command_context_mode(CMD_CTX, COMMAND_EXEC);
if (command_run_line(CMD_CTX, "jtag init") == ERROR_OK)
{
LOG_DEBUG("Examining targets...");
if (target_examine() != ERROR_OK)
LOG_DEBUG("target examination failed");
}
else
LOG_WARNING("jtag initialization failed; try 'jtag init' again.");
retval = command_run_line(CMD_CTX, "transport init");
if (ERROR_OK != retval)
return ERROR_FAIL;
LOG_DEBUG("Examining targets...");
if (target_examine() != ERROR_OK)
LOG_DEBUG("target examination failed");
command_context_mode(CMD_CTX, COMMAND_CONFIG);
if (command_run_line(CMD_CTX, "flash init") != ERROR_OK)
@@ -227,16 +228,13 @@ struct command_context *setup_command_handler(Jim_Interp *interp)
&server_register_commands,
&gdb_register_commands,
&log_register_commands,
&transport_register_commands,
&interface_register_commands,
&jtag_register_commands,
&xsvf_register_commands,
&svf_register_commands,
&target_register_commands,
&flash_register_commands,
&nand_register_commands,
&pld_register_commands,
&mflash_register_commands,
NULL
};
for (unsigned i = 0; NULL != command_registrants[i]; i++)
{